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CiM-550 IP Enabled Satellite Modem Rev. 2
Front Panel Menus CD/CIM550.IOM
33
SELECT\CONFIG\TX\TSI
DISPLAY SELECTIONS/DESCRIPTION
SELECT TRANSMIT SPECTRAL
INVERSION: OFF ON(ENTER)
TSI - Transmit Spectral Interval
ON
OFF
When in the ON position, and QPSK is
selected, the transmit spectrum is
inverted (which is the same as reversing
the direction of phase rotation in the
modulator). In BPSK, the time-order of
bits out of the FEC encoder is reversed,
to make the modem compatible with
certain other manufacturer’s modems.
4.1.5.2.2 SELECT\CONFIG\RX
DISPLAY SELECTIONS/DESCRIPTION
RX: MOD FRQ DATA FEC ACQ
DESCRAM CLK BUF RSI Eb/No
SELECT\CONFIG\RX\MOD
DISPLAY SELECTIONS/DESCRIPTION
SELECT RX MODULATION:
BPSK QPSK OQPSK (ENTER)
BPSK
QPSK
OQPSK
Note: If a TURBO FEC option is selected, the
demodulation type will be automatically
fixed, and the user will be presented with a
warning screen.
SELECT\CONFIG\RX\FRQ
DISPLAY SELECTIONS/DESCRIPTION
EDIT RX FREQUENCY:
72.2345 MHz (PRESS ENT)
The range is 52 - 88 MHz (70 MHz factory option) or
104 - 176 MHz (140 MHz factory option).